# Digital Communication

 Course Code : EC6501 Author : uLektz University : Anna University, Tamil Nadu Regulation : 2013 Categories : Electronics & Communication Format : ePUB3 (DRM Protected) Type : eBook

FREE

Description :Digital Communication of EC6501 covers the latest syllabus prescribed by Anna University, Tamil Nadu for regulation 2013. Author: uLektz, Published by uLektz Learning Solutions Private Limited.

Note : No printed book. Only ebook. Access eBook using uLektz apps for Android, iOS and Windows Desktop PC.

##### Topics
###### UNIT I SAMPLING & QUANTIZATION

1.1 Low pass sampling, Band pass sampling theorem, Problem

1.2 Aliasing

1.3 Signal Reconstruction

1.4 Quantization

1.5 Uniform & non-uniform quantization, Necessity of Non-uniform Quantization for Speech Signal

1.6 Quantization noise

1.7 Logarithmic Companding of speech signal

1.9 TDM (Time Division-Multiplexing)

###### UNIT II WAVEFORM CODING

2.1 Prediction filtering

2.2 DPCM, Expression For The Processing Gain Of a DPCM System

2.3 Delta Modulation, Drawbacks, Comparison

2.5 Linear Predictive Coding

###### UNIT III BASEBAND TRANSMISSION

3.1 Properties of Line codes.

3.2 Power Spectral Density

3.3 Unipolar NRZ

3.4 Polar RZ & NRZ

3.5 Bipolar NRZ

3.6 Manchester

3.7 ISI and Nyquist criterion for distortionless transmission

3.8 Pulse shaping

3.9 Correlative coding

3.10 M-ary schemes

3.11 Eye pattern and adaptive equalization

###### UNIT IV DIGITAL MODULATION SCHEME

4.1 Geometric Representation of signals

4.2 Generation and Detection of signals

4.3 PSD & BER

4.4 Coherent BPSK, DS-SS BPSK, Comparison of BPSK with BFSK, Processing Gain (PG)

4.5 BFSK

4.6 QPSK, Quadrature Phase Shift Keying (QPSK) Modulation, Probability of error

4.7 QAM

4.8 Carrier and symbol Synchronization

4.10 Principle of DPSK

###### UNIT V ERROR CONTROL CODING

5.1 Channel coding theorem

5.2 Linear Block codes

5.3 Hamming codes

5.4 Cyclic codes, Properties Of Cyclic Codes, Cyclic Encoder And Decoder

5.5 Convolutional codes

5.6 Viterbi Decoder